Ubuntu – Xubuntu 14.04: Screen Resolution 1440×900, no xorg.conf or lightdm.conf

So I'm quite confused now by the fact that I read a lot of different solutions for a Screen Resolution problem, but none of them apply to my case (I think).

So I'm running a Xubuntu 14.04 x64 and cannot get my LG Flatron W1934S suitable with the system.

cvt output:

linuxdev@linux-dev-pc:~$ cvt 1440 900
# 1440x900 59.89 Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHz
Modeline "1440x900_60.00"  106.50  1440 1528 1672 1904  900 903 909 934 -hsync +vsync

as for now the screen work perfectly by using the following lines

$: xrandr --newmode "1440x900_60.00"  106.50  1440 1528 1672 1904  900 903 909 934 -hsync +vsync
$: xrandr --addmode VGA1 1440x900_60.00
$: xrandr --output VGA1 --mode 1440x900_60.00

And underneath the current situation:

linuxdev@linux-dev-pc:~$ xrandr -q
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 32767 x 32767
VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1440x900       59.9  
   1024x768       60.0  
   800x600        60.3     56.2  
   848x480        60.0  
   640x480        59.9  
   1440x900_60.00   59.9* 
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

LSHW display output:

*-display
             description: VGA compatible controller
             product: 82945G/GZ Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:16 memory:fe980000-fe9fffff ioport:dc00(size=8) memory:d0000000-dfffffff memory:fe940000-fe97ffff

Now is the big question; how do I create a permanent record for it?

What I tried till now is to look into the 'xorg.conf', that does not exist anymore after upgrading. When I manually create the 'xorg.conf' the system craps out and will not boot anymore into the GUI. Through the terminal, I need to remove the 'xorg.conf' to get it booted again into the normal state with the low resolution.

Also the 'lightdm.conf' is quite a hassle to find or adjust so my options run very low at the moment. (The only lightdm.conf that I found is located at /etc/init, but with the output from the file I don't have a clue where or what to edit)

/etc/init/lightdm.conf output:

linuxdev@linux-dev-pc:~$ cat /etc/init/lightdm.conf
# LightDM - light Display Manager
#
# The display manager service manages the X servers running on the
# system, providing login and auto-login services
#
# based on gdm upstart script

description "LightDM Display Manager"
author      "Robert Ancell <robert.ancell@canonical.com>"

start on ((filesystem
           and runlevel [!06]
           and started dbus
           and plymouth-ready)
          or runlevel PREVLEVEL=S)

stop on runlevel [016]

emits login-session-start
emits desktop-session-start
emits desktop-shutdown

script
    if [ -n "$UPSTART_EVENTS" ]
    then
        # Check kernel command-line for inhibitors, unless we are being called
        # manually
        for ARG in $(cat /proc/cmdline); do
            if [ "$ARG" = "text" ]; then
        plymouth quit || : 
                stop
        exit 0
            fi
        done

    [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/usr/bin/lightdm" -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/lightdm" ] || { stop; exit 0; }

    if [ "$RUNLEVEL" = S -o "$RUNLEVEL" = 1 ]
    then
        # Single-user mode
        plymouth quit || :
        exit 0
    fi
    fi

    exec lightdm
end script

post-start script
    sleep 5
    clear > /dev/tty7
end script

post-stop script
    clear > /dev/tty7
    sleep 1
    if [ "$UPSTART_STOP_EVENTS" = runlevel ]; then
        initctl emit desktop-shutdown
    fi
end script

Thanks for the read and eventual reply!